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Finding the Fourth Proportional to 18,603.88, 27,882.07 and 8,721.39

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Solution

The fourth proportional to 18,603.88, 27,882.07 and 8,721.39 is: 13,070.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,603.88 : 27,882.07 = 8,721.39 : x
  2. Step 2: Convert to fraction form
    18,603.88/27,882.07 = 8,721.39/x
  3. Step 3: Cross multiply
    18,603.88x = 27,882.07 × 8,721.39
  4. Step 4: Simplify right side
    18,603.88x = 243,170,406.48
  5. Step 5: Solve for x
    x = 243,170,406.48/18,603.88
  6. Step 6: Final answer
    x = 13,070.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.